expression, noun, noun which may take the genitive case particle 'no'
the other; the other one
Used to refer to the remaining one of two items, or the other side/party in a comparison. Often followed by は or の.
この二つの箱のうち、もう一方は空っぽだ。
Of these two boxes, the other one is empty.
彼はもう一方の手でドアを開けた。
He opened the door with his other hand.